Although fiber-optical two-photon endoscopy has been recognized as a potential high-resolution diagnostic and therapeutic procedure in vivo, its resolution is limited by the optical diffraction nature to a few micrometers due to the low numerical aperture of an endoscopic objective. On the other hand, stimulated emission depletion (STED) achieved by a circularly-polarized vortex beam has been u...

Spontaneous damage to DNA as a result of deamination, oxidation and depurination is greatly accelerated at high temperatures. Hyperthermophilic microorganisms constantly exposed to temperatures exceeding 80 degrees C are endowed with powerful DNA repair mechanisms to maintain genome stability. Of particular interest is the processing of DNA lesions during replication, which can result in fixed ...

The polarization characteristics of birefringent tissues could be only partially obtained using linearly polarized light in polarization sensitive optical imaging. Here we analyze the change in polarization of backscattered light from birefringent structures versus the orientations of the incident polarizations using linearly, circularly and radially polarized light in a cross-polarized confoca...

Self-assembled microwires of terephthalic acid (TPA) and melamine are prepared through the evaporation of water in a solution mixture of TPA and melamine. The microwires were characterized by using scanning electron microscope (SEM), attenuated total reflection infrared (ATR-IR) spectra, and cross-polarized optical microscopy (CPOM). The TPA•M microwires showed semi-conductive properties.

INTRODUCTION: For studying living organisms it is often desirable to clearly image molecular and higher level architecture without using exogenous markers such as dyes or fluorescent labels. Traditionally, the polarized light microscope has been a versatile tool to reveal the optical anisotropy such as birefringence of molecular fine structure of transparent specimens at high temporal and spati...

The uniqueness of polarization microscopy lies in the use of light beams with controlled states of polarization. With such beams, optical properties such as birefringence, dichroism, and optical activity are detectable, and optical constants are determinable in an exceedingly small sample volume. Since birefringence and dichroism generally reflect the arrangement or properties of material the d...

Linearly polarized emission has been observed for the nanobelts fabricated from a perylene diimide molecule through both solution-based and surface-supported self-assembling. The measurement of polarized emission was performed over single nanobelts with use of a near-field scanning optical microscope (NSOM) adapted with emission polarization (by putting a planar polarizer before the detector). ...

Optimal plasmonic focusing can be achieved through matching the rotational symmetry of the plasmonic lens to the polarization symmetry of a radially polarized illumination. In this letter, we report the experimental confirmation of the focusing properties and field enhancement effect of plasmonic lens made of multiple concentric annular rings using a collection mode near field scanning optical ...

1. Lyotropic behavior of C12OazoE3OH: Pure amphiphiles with rigid segments like azobenzenes with a similar non-ionic head are able to form stable bilayers1. An aliquot of C12OazoE3OH (19 mM, in chloroform) was placed onto non-treated glass and evaporation the solvent at room temperature was allowed. Polarized optical microscopy (POM) observation through crossed polarizers revealed the smectic C...